Application that crashed: kontact
Version of the application: 4.3.0 pre
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-6-generic x86_64
Distribution: Ubuntu karmic (development branch)

What I was doing when the application crashed:
Opening kontact, switching to kmail and fetching new messages from local (fetchmail) mailqueue. Errors "rebuilding index" appear when selecting one or the other mailfolder. 
Filesystem is ext4, kernel 2.6.30-6-generic #7-Ubuntu SMP 64bit.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  KMMsgBase::fillStringPartCache (this=0x270baa0) at ../../kmail/kmmsgbase.cpp:911
#6  0x00007f44127061ad in KMMsgBase::getStringPart (this=0x270baa0, t=KMMsgBase::MsgFromPart) at ../../kmail/kmmsgbase.cpp:896
#7  0x00007f44126acb54 in KMMsgInfo::fromStrip (this=0x348ad70) at ../../kmail/kmmsginfo.cpp:290
#8  0x00007f4412990c13 in KMail::MessageListView::StorageModel::initializeMessageItem (this=<value optimized out>, mi=<value optimized out>, row=<value optimized out>, bUseReceiver=false)
    at ../../kmail/messagelistview/storagemodel.cpp:296
#9  0x00007f44129b6bb7 in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJobPass1Fill (this=0x2352c60, job=<value optimized out>, tStart=<value optimized out>)
    at ../../kmail/messagelistview/core/model.cpp:2729
#10 0x00007f44129b84b5 in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJob (this=0x2352c60, job=0x348ad70, tStart=@0x7fffb8225480) at ../../kmail/messagelistview/core/model.cpp:3391
#11 0x00007f44129b8aaa in KMail::MessageListView::Core::Model::viewItemJobStepInternal (this=0x2352c60) at ../../kmail/messagelistview/core/model.cpp:3763
#12 0x00007f44129b967c in KMail::MessageListView::Core::Model::viewItemJobStep (this=0x2352c60) at ../../kmail/messagelistview/core/model.cpp:3919
#13 0x00007f44129ba59f in KMail::MessageListView::Core::Model::setStorageModel (this=0x2352c60, storageModel=<value optimized out>, 
    preSelectionMode=KMail::MessageListView::Core::PreSelectLastSelected) at ../../kmail/messagelistview/core/model.cpp:791
#14 0x00007f44129e16b1 in KMail::MessageListView::Core::View::setStorageModel (this=0x234c9d0, storageModel=0x348ad70, preSelectionMode=1836017711) at ../../kmail/messagelistview/core/view.cpp:171
#15 0x00007f44129e7f8b in KMail::MessageListView::Core::Widget::setStorageModel (this=0x21c2070, storageModel=0x2707ac0, preSelectionMode=KMail::MessageListView::Core::PreSelectLastSelected)
    at ../../kmail/messagelistview/core/widgetbase.cpp:305
#16 0x00007f441299446f in KMail::MessageListView::Widget::setFolder (this=0x21c2070, fld=<value optimized out>, icon=<value optimized out>, preSelectionMode=<value optimized out>)
    at ../../kmail/messagelistview/widget.cpp:113
#17 0x00007f441298de96 in KMail::MessageListView::Pane::setCurrentFolder (this=0x233a2f0, fld=0x2301f10, preferEmptyTab=<value optimized out>, 
    preSelectionMode=KMail::MessageListView::Core::PreSelectLastSelected, overrideLabel=@0x7fffb8225d50) at ../../kmail/messagelistview/pane.cpp:201
#18 0x00007f4412868976 in KMMainWidget::folderSelected (this=0x23415e0, aFolder=<value optimized out>, forceJumpToUnread=false, preferNewTabForOpening=47) at ../../kmail/kmmainwidget.cpp:3077
#19 0x00007f441286ad6c in KMMainWidget::qt_metacall (this=0x23415e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb8225ee0) at ./kmmainwidget.moc:509
#20 0x00007f4428477e12 in QMetaObject::activate (sender=0x2332ae0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3120
#21 0x00007f4412616a10 in KMail::FolderViewManager::folderActivated (this=0x0, _t1=0x2301f10, _t2=false) at ./folderview.moc:89
#22 0x00007f4412620c57 in KMail::FolderView::activateItemInternal (this=0x2405fa0, fvi=0x29445e0, keepSelection=false, notifyManager=true, middleButton=false) at ../../kmail/folderview.cpp:1104
#23 0x00007f4412621632 in KMail::FolderView::qt_metacall (this=0x2405fa0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb82260b0) at ./folderview.moc:211
#24 0x00007f4412625210 in KMail::MainFolderView::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./mainfolderview.moc:64
#25 0x00007f4428477e12 in QMetaObject::activate (sender=0x2405fa0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3120
#26 0x00007f44292f8ae0 in QTreeWidget::itemClicked (this=0x0, _t1=0x29445f0, _t2=0) at .moc/release-shared/moc_qtreewidget.cpp:201
#27 0x00007f4429305933 in QTreeWidget::qt_metacall (this=0x2405fa0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb82262b0) at .moc/release-shared/moc_qtreewidget.cpp:144
#28 0x00007f4429e5ad60 in KPIM::TreeWidget::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at moc_treewidget.cpp:68
#29 0x00007f4429eb5fb0 in KPIM::FolderTreeWidget::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./foldertreewidget.moc:68
#30 0x00007f4412621430 in KMail::FolderView::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./folderview.moc:191
#31 0x00007f4412625210 in KMail::MainFolderView::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./mainfolderview.moc:64
#32 0x00007f4428477e12 in QMetaObject::activate (sender=0x2405fa0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3120
#33 0x00007f442927fec5 in QAbstractItemView::clicked (this=0x0, _t1=<value optimized out>) at .moc/release-shared/moc_qabstractitemview.cpp:321
#34 0x00007f442928cd5b in QAbstractItemView::mouseReleaseEvent (this=0x2405fa0, event=0x7fffb8226f50) at itemviews/qabstractitemview.cpp:1655
#35 0x00007f4428dcad0f in QWidget::event (this=0x2405fa0, event=0x7fffb8226f50) at kernel/qwidget.cpp:7521
#36 0x00007f442915b186 in QFrame::event (this=0x2405fa0, e=0x7fffb8226f50) at widgets/qframe.cpp:559
#37 0x00007f44292903fd in QAbstractItemView::viewportEvent (this=0x2405fa0, event=0x7fffb8226f50) at itemviews/qabstractitemview.cpp:1471
#38 0x00007f44292c6d70 in QTreeView::viewportEvent (this=0x2405fa0, event=0x7fffb8226f50) at itemviews/qtreeview.cpp:1264
#39 0x00007f44284616e7 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x216ade0, event=0x7fffb8226f50) at kernel/qcoreapplication.cpp:726
#40 0x00007f4428d7b3cc in QApplicationPrivate::notify_helper (this=0x1d218a0, receiver=0x216ade0, e=0x7fffb8226f50) at kernel/qapplication.cpp:4053
#41 0x00007f4428d82db1 in QApplication::notify (this=<value optimized out>, receiver=0x216ade0, e=0x7fffb8226f50) at kernel/qapplication.cpp:3759
#42 0x00007f44299e8c36 in KApplication::notify (this=0x7fffb822cee0, receiver=0x216ade0, event=0x7fffb8226f50) at ../../kdeui/kernel/kapplication.cpp:302
#43 0x00007f44284623ec in QCoreApplication::notifyInternal (this=0x7fffb822cee0, receiver=0x216ade0, event=0x7fffb8226f50) at kernel/qcoreapplication.cpp:610
#44 0x00007f4428d81ff0 in QApplicationPrivate::sendMouseEvent (receiver=0x216ade0, event=0x7fffb8226f50, alienWidget=0x216ade0, nativeWidget=0x1d36a30, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#45 0x00007f4428de927e in QETWidget::translateMouseEvent (this=0x1d36a30, event=<value optimized out>) at kernel/qapplication_x11.cpp:4448
#46 0x00007f4428de82a8 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffb8228a80) at kernel/qapplication_x11.cpp:3566
#47 0x00007f4428e11a34 in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#48 0x00007f44222608be in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#49 0x00007f4422263f98 in ?? () from /usr/lib/libglib-2.0.so.0
#50 0x00007f44222640c0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#51 0x00007f442848b706 in QEventDispatcherGlib::processEvents (this=0x1cf6850, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#52 0x00007f4428e111de in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#53 0x00007f4428460cc2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#54 0x00007f4428461094 in QEventLoop::exec (this=0x7fffb8228db0, flags=) at kernel/qeventloop.cpp:200
#55 0x00007f442922db3e in QDialog::exec (this=0x34286f0) at dialogs/qdialog.cpp:498
#56 0x00007f442996f6b5 in KMessageBox::createKMessageBox (dialog=<value optimized out>, icon=<value optimized out>, text=<value optimized out>, strlist=<value optimized out>, 
    ask=<value optimized out>, checkboxReturn=<value optimized out>, options=) at ../../kdeui/dialogs/kmessagebox.cpp:331
#57 0x00007f4429970930 in KMessageBox::createKMessageBox (dialog=<value optimized out>, icon=QMessageBox::Critical, text=<value optimized out>, strlist=<value optimized out>, ask=@0x7fffb82293b0, 
    checkboxReturn=0x0, options={i = 1}, details=@0x7fffb82293a0) at ../../kdeui/dialogs/kmessagebox.cpp:151
#58 0x00007f44299717f3 in KMessageBox::errorListWId (parent_id=0, text=@0x7fffb82294f0, strlist=@0x7fffb8229480, caption=@0x7fffb82294e0, options=) at ../../kdeui/dialogs/kmessagebox.cpp:849
#59 0x00007f44299719f2 in KMessageBox::error (parent=<value optimized out>, text=@0x7fffb82294f0, caption=@0x7fffb82294e0, options=<value optimized out>) at ../../kdeui/dialogs/kmessagebox.cpp:813
#60 0x00007f441286ca82 in KMFolderIndex::recreateIndex (this=0x231a880) at ../../kmail/kmfolderindex.cpp:486
#61 0x00007f4412706b15 in KMMsgBase::getLongPart (this=0x3257f30, t=KMMsgBase::MsgStatusPart) at ../../kmail/kmmsgbase.cpp:1045
#62 0x00007f44126ac805 in KMMsgInfo::status (this=0x3257f30) at ../../kmail/kmmsginfo.cpp:503
#63 0x00007f441286d963 in KMFolderIndex::readIndex (this=0x231a880) at ../../kmail/kmfolderindex.cpp:248
#64 0x00007f441286f058 in KMFolderIndex::openInternal (this=0x231a880, options=) at ../../kmail/kmfolderindex_common.cpp:153
#65 0x00007f441276aef1 in KMFolderMaildir::open (this=0x231a880) at ../../kmail/kmfoldermaildir.cpp:133
#66 0x00007f4412991e00 in StorageModel (this=0x20926f0, folder=0x2318940, parent=<value optimized out>) at ../../kmail/messagelistview/storagemodel.cpp:55
#67 0x00007f4412994460 in KMail::MessageListView::Widget::setFolder (this=0x21c2070, fld=<value optimized out>, icon=<value optimized out>, preSelectionMode=<value optimized out>)
    at ../../kmail/messagelistview/widget.cpp:113
#68 0x00007f441298de96 in KMail::MessageListView::Pane::setCurrentFolder (this=0x233a2f0, fld=0x2318940, preferEmptyTab=<value optimized out>, 
    preSelectionMode=KMail::MessageListView::Core::PreSelectLastSelected, overrideLabel=@0x7fffb8229dc0) at ../../kmail/messagelistview/pane.cpp:201
#69 0x00007f4412868976 in KMMainWidget::folderSelected (this=0x23415e0, aFolder=<value optimized out>, forceJumpToUnread=false, preferNewTabForOpening=47) at ../../kmail/kmmainwidget.cpp:3077
#70 0x00007f441286ad6c in KMMainWidget::qt_metacall (this=0x23415e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb8229f50) at ./kmmainwidget.moc:509
#71 0x00007f4428477e12 in QMetaObject::activate (sender=0x2332ae0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3120
#72 0x00007f4412616a10 in KMail::FolderViewManager::folderActivated (this=0x0, _t1=0x2318940, _t2=false) at ./folderview.moc:89
#73 0x00007f4412620c57 in KMail::FolderView::activateItemInternal (this=0x2405fa0, fvi=0x230f480, keepSelection=false, notifyManager=true, middleButton=false) at ../../kmail/folderview.cpp:1104
#74 0x00007f4412621632 in KMail::FolderView::qt_metacall (this=0x2405fa0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb822a120) at ./folderview.moc:211
#75 0x00007f4412625210 in KMail::MainFolderView::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./mainfolderview.moc:64
#76 0x00007f4428477e12 in QMetaObject::activate (sender=0x2405fa0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3120
#77 0x00007f44292f8ae0 in QTreeWidget::itemClicked (this=0x0, _t1=0x230f490, _t2=0) at .moc/release-shared/moc_qtreewidget.cpp:201
#78 0x00007f4429305933 in QTreeWidget::qt_metacall (this=0x2405fa0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb822a320) at .moc/release-shared/moc_qtreewidget.cpp:144
#79 0x00007f4429e5ad60 in KPIM::TreeWidget::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at moc_treewidget.cpp:68
#80 0x00007f4429eb5fb0 in KPIM::FolderTreeWidget::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./foldertreewidget.moc:68
#81 0x00007f4412621430 in KMail::FolderView::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./folderview.moc:191
#82 0x00007f4412625210 in KMail::MainFolderView::qt_metacall (this=0x0, _c=55094640, _id=1836017711, _a=0x0) at ./mainfolderview.moc:64
#83 0x00007f4428477e12 in QMetaObject::activate (sender=0x2405fa0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3120
#84 0x00007f442927fec5 in QAbstractItemView::clicked (this=0x0, _t1=<value optimized out>) at .moc/release-shared/moc_qabstractitemview.cpp:321
#85 0x00007f442928cd5b in QAbstractItemView::mouseReleaseEvent (this=0x2405fa0, event=0x7fffb822afc0) at itemviews/qabstractitemview.cpp:1655
#86 0x00007f4428dcad0f in QWidget::event (this=0x2405fa0, event=0x7fffb822afc0) at kernel/qwidget.cpp:7521
#87 0x00007f442915b186 in QFrame::event (this=0x2405fa0, e=0x7fffb822afc0) at widgets/qframe.cpp:559
#88 0x00007f44292903fd in QAbstractItemView::viewportEvent (this=0x2405fa0, event=0x7fffb822afc0) at itemviews/qabstractitemview.cpp:1471
#89 0x00007f44292c6d70 in QTreeView::viewportEvent (this=0x2405fa0, event=0x7fffb822afc0) at itemviews/qtreeview.cpp:1264
#90 0x00007f44284616e7 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x216ade0, event=0x7fffb822afc0) at kernel/qcoreapplication.cpp:726
#91 0x00007f4428d7b3cc in QApplicationPrivate::notify_helper (this=0x1d218a0, receiver=0x216ade0, e=0x7fffb822afc0) at kernel/qapplication.cpp:4053
#92 0x00007f4428d82db1 in QApplication::notify (this=<value optimized out>, receiver=0x216ade0, e=0x7fffb822afc0) at kernel/qapplication.cpp:3759
#93 0x00007f44299e8c36 in KApplication::notify (this=0x7fffb822cee0, receiver=0x216ade0, event=0x7fffb822afc0) at ../../kdeui/kernel/kapplication.cpp:302
#94 0x00007f44284623ec in QCoreApplication::notifyInternal (this=0x7fffb822cee0, receiver=0x216ade0, event=0x7fffb822afc0) at kernel/qcoreapplication.cpp:610
#95 0x00007f4428d81ff0 in QApplicationPrivate::sendMouseEvent (receiver=0x216ade0, event=0x7fffb822afc0, alienWidget=0x216ade0, nativeWidget=0x1d36a30, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#96 0x00007f4428de927e in QETWidget::translateMouseEvent (this=0x1d36a30, event=<value optimized out>) at kernel/qapplication_x11.cpp:4448
#97 0x00007f4428de82a8 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffb822caf0) at kernel/qapplication_x11.cpp:3566
#98 0x00007f4428e11a34 in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#99 0x00007f44222608be in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#100 0x00007f4422263f98 in ?? () from /usr/lib/libglib-2.0.so.0
#101 0x00007f44222640c0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#102 0x00007f442848b706 in QEventDispatcherGlib::processEvents (this=0x1cf6850, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#103 0x00007f4428e111de in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#104 0x00007f4428460cc2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#105 0x00007f4428461094 in QEventLoop::exec (this=0x7fffb822ce20, flags=) at kernel/qeventloop.cpp:200
#106 0x00007f4428463189 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#107 0x0000000000403f27 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi